vaporstat wired in series with pressuretrol

josephc

Does anyone have a diagram showing how to wire these two instruments in series? Also my pressuretrol doesnt have an R or B label on either terminal.

What i have done is wire #1 from boiler to term R on vaporstat and then connected a wire from there to the pressuretrol on one of its terminals. Then the other wire #2 from boiler to the B terminal on vaporstat. Then a wire from there to the other terminal on the pressuretrol. Is this considered in series since going through both switches?
Thank you
Joe

Jamie Hall

No. You've wired them in parallel. Boiler, terminal R on vapourstat. Terminal B on vapourstat to one of the pressuretrols. Other terminal on pressuretrol back to #2 on boiler -- assuming you have no other safeties. If there are other safeties, then go to them before you go back to the boiler.

josephc

Thank you; Ive corrected it. Since there isnt an R or B on the pressuretrol terminals is it correct to assume it doesnt mater which one is wired to the vaporstat and which continues on to the boiler.

Jamie Hall

josephc said:

Thank you; Ive corrected it. Since there isnt an R or B on the pressuretrol terminals is it correct to assume it doesnt mater which one is wired to the vaporstat and which continues on to the boiler.

Correct. It's just a simple switch.

EBEBRATT-Ed

@Jamie Hall is correct assuming the pressure control is a "break on rise" pressure control with only two terminals which is the most likely senario